Have you had much or any success with the Ultra Sonic devices on Whitetail Deer?

We have. There are two units we recommend that do a good job. The first is the YARD GARD. It detects motion and then turns on so it's not constantly using energy. I've used this model at my house with good results. I wired it up to be plugged in and was able to keep the deer at bay. And it will work on all animals but rabbit. I ended up having to spray some of the low lying flowers with DEER AWAY to insure the rabbits didn't get them but combined with the Yard Gard, I've been able to protect my pansies, hostas and other ground cover.

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